Remove ContextProvider::IsContextLost.

cc/output/program_binding.h

Index: cc/output/program_binding.h
diff --git a/cc/output/program_binding.h b/cc/output/program_binding.h
index 1d5132bdaea6828148ab4d996774a1569fd00ad2..8018cad76e34ca33ef3c6bbdf6abef44aef25d12 100644
--- a/cc/output/program_binding.h
+++ b/cc/output/program_binding.h
@@ -42,6 +42,8 @@ class ProgramBindingBase {
                                unsigned fragment_shader);
   void CleanupShaders(gpu::gles2::GLES2Interface* context);
 
+  bool IsContextLost(gpu::gles2::GLES2Interface* context);
+
   unsigned program_;
   unsigned vertex_shader_id_;
   unsigned fragment_shader_id_;
@@ -79,7 +81,7 @@ class ProgramBinding : public ProgramBindingBase {
     DCHECK(context_provider);
     DCHECK(!initialized_);
 
-    if (context_provider->IsContextLost())
+    if (IsContextLost(context_provider->ContextGL()))
       return;
 
     fragment_shader_.set_blend_mode(blend_mode);
@@ -89,7 +91,7 @@ class ProgramBinding : public ProgramBindingBase {
             context_provider->ContextGL(),
             vertex_shader_.GetShaderString(),
             fragment_shader_.GetShaderString(precision, sampler))) {
-      DCHECK(context_provider->IsContextLost());
+      DCHECK(IsContextLost(context_provider->ContextGL()));
       return;
     }
 
@@ -101,7 +103,7 @@ class ProgramBinding : public ProgramBindingBase {
 
     // Link after binding uniforms
     if (!Link(context_provider->ContextGL())) {
-      DCHECK(context_provider->IsContextLost());
+      DCHECK(IsContextLost(context_provider->ContextGL()));
       return;
     }